University:
Felician University
Course:
CRIM-110 | Criminal Justice I
Academic year:

2022
Views:

391

Pages:

13
Author:

larbiwxcvbn

3 Classes of FP 1. ARCHES: ridgelines rise in the center to create a wavelike pattern 2 types: TENTED and PLAIN Tented arches: sharper central rise than plain LOOPS 2. : must have one delta and one or more ridges that enter and leave on the same side. (These patterns are named for their positions related to the radius & ulna bones.) Delta Ulnar Loop (Right Thumb) Loop opens toward right or the ulna bone. Radial Loop (Right Thumb) Loop opens toward the left or the radial bone. NOTE: On the left hand, a loop that opens to the left would be an ulnar loop, while one that opens to the right would be a radial loop. Both are prints from RIGHT hand ULNAR RADIAL 3. WHORLS have at least one ridge that makes (or tends to make) a complete circuit. They also have at least 2deltas. If a print has more than two deltas, it is most likely an accidental. Plain Whorl Central Pocket Whorl Draw a line between the two deltas in the plain and central pocket whorls. If some of the curved ridges touch the line, it is a plain whorl. If none of the center core touches the line, it is a central pocket whorl. Double Loop Whorl Accidental Whorl Delta Delta Double loop whorls are made up of any two loops combined into one print. Accidental whorls contain two or more patterns (not including the plain arch), or does not clearly fall under any of the other categories. FP Factoid: 60% of fingers have loops, 35% have whorls, and 5% have arches Did you know? Dactyloscopy is the study of fingerprint identification. Police investigators are experts in collecting “dactylograms”, otherwise known as fingerprints. Man chews 1off his own 'fingerprints in an attempt to not Ье identified Ьу po1lice I Science SUBSCRIBE LDG IN New Technique Can ldentify Gender From а Fingerprint Тhе test is based on certain amino acids found in the fingerprints. Levels are twice as blgh in the s,veat of women as in that of men. "Fingerprints Ъаvе really Ъееn treated as pictures for more than а Ъundred years," said Jan Halamek, а forensic scientist a.t the State University of New York a.t Albany and one of the study's authors. "The only major improvements in recent years have been due to software and databases that make it faster to match fingerprints." Mr. Halamek and his colleagues tested fingerprints on а doorknob, a. lamina.te desktop, а composite bench top and а computer screen. Regardless of the surface type, they found it was posstЪle to tel1 v.тhether the fingerprint belonged to а woman Ьу testing levels of residual amino acids. Тhе report was published in the joumal Analytical Chemistry. Тhе study involved only а few fingerprints, however, and а larger sample is required to ensure the results are statistically significant, Dr. Halamek said. Не and bls colleagues are developing additional fingerprint tests based on protein markers found in Ыооd samples. "We ,vant to create а very simple kit wЪich can determine on the spot whether the person was young or old, male or female, and their etЪnicity," Dr. Halamek said. Fingerprints in the lab of forensic scientists who have developed а technic came from а man or а vюman. PAUL МlllER / UNYERSIТY АТ AUW'Y Тhese tests, he cautioned, could not replace DNA tests, which are reliaЫe but also time-consuming and expensive. NО\ЪМ:ВЕR20, 2015 OЬservatory 8ySINDYAN.. ВНАNОО А simple test perfoпned at а crime scene may help forensic scientists determine 1,vhether а fingerprint belongs to а man or а v.1oman, а ne,v study reports.